Power Vision Information Thread
I can see the difference between the two tunes but I'm assuming those are the changes you made. The tune does say that Target Tune is enabled so may be that is a good start. Datalog will be the point of knowing what is going on. Jamie gave much better insight on it than I can.
On the FBW bikes, I have an '08 touring but when I loaded a tune with MAP-based VE values it gave me nothing but trouble. I'm currently running a TPS-based tune and it seems much better. Been a long couple of days trying to get it dialed in.
I purchased my PV from a dealership before I knew about FM. In hindsight I would definitely buy it from FM as they are (AFAIK) the only distributor able to properly support the product at both basic and advanced levels. Any help that Jamie provides here for my questions / issues is certainly appreciated but not expected.
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Beginning operation: ReadDTCs
PV Serial #: (omitted)
Firmware Version: 2.0.19-1506
Firmware Build Date: Jul 27 2015 14:34:40
Tune Database Version: 0.0.9.37
Enabled Pins: TUN
Tuning: Locked to Vehicle
P1632 HIST
Odometer learned up
U0156 HIST
Lost comm w/speedo
Operation Returned 0:
End of operation.
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1. when I am in TT auto tune mode, the ECM and TT module and working as expected and I am getting real time adjustments to VE to hit the target lambda values. hence bike is running very good, strong, no cracking on decel, etc. (runs very good in fact - best yet!)
2. when I am in normal mode, TT auto tune disabled, ECM is using VE as set in the tune file and not adjusting it to meet target lambda values. VE's are very lean in the tune file compared to what I have been running with my past manual tunes. hence bike has less power, feels hotter, exhaust smells lean, exhaust has different tone, more cracking on decel. In my tune file I do have closed loop = 1 so it should be running full closed loop operation. My leanest AFR table value is 13.8 at present.
This could lead me to conclude that for whatever reason the TT tune file has been stripped or disabled of that functionality. Running a TT auto tune session may just force ECM to use real time WB and VE adjustments regardless.
Just wild speculation at this point- logging a normal ride should show more. The P error code may mean that for some reason the ECM may not be fully powering down properly. Wondering if leaving the PV plugged in after shutting off bike has anything to do with that. I only started doing that recently, e.g. leave it plugged in and tucked in the swingarm bag.
Last edited by LA_Dog; Feb 8, 2016 at 11:10 AM.
1. when I am in TT auto tune mode, the ECM and TT module and working as expected and I am getting real time adjustments to VE to hit the target lambda values. hence bike is running very good, strong, no cracking on decel, etc. (runs very good in fact - best yet!)
2. when I am in normal mode, TT auto tune disabled, ECM is using VE as set in the tune file and not adjusting it to meet target lambda values. VE's are very lean in the tune file compared to what I have been running with my past manual tunes. hence bike has less power, feels hotter, exhaust smells lean, exhaust has different tone, more cracking on decel. In my tune file I do have closed loop = 1 so it should be running full closed loop operation. My leanest AFR table value is 13.8 at present.
This could lead me to conclude that for whatever reason the TT tune file has been stripped or disabled of that functionality. Running a TT auto tune session may just force ECM to use real time WB and VE adjustments regardless.
Just wild speculation at this point- logging a normal ride should show more. The P error code may mean that for some reason the ECM may not be fully powering down properly. Wondering if leaving the PV plugged in after shutting off bike has anything to do with that. I only started doing that recently, e.g. leave it plugged in and tucked in the swingarm bag.

Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
The Best of Harley-Davidson for Lifelong Riders
Last edited by fuelmoto; Feb 8, 2016 at 12:44 PM.
The green screen is indeed showing hit counts during a TT AT session. But it is not making VE changes. It always shows “0 hits” and 0 changes after I get back from a TT AT ride session.
If I ride bike with TT auto tune on, the bike runs well and is fast. If I ride bike in normal mode it does not run as well and feels flat.
I have included two logs in the attached zip file-
log0000 is bike in normal operation mode no auto tune enabled, warming up and then a short ride. Look at the WB O2 AFRs. They are odd and have quite a disparity between F/R cylinder ratios. I don’t have any 14 AFR ratios in my lambda table. bike feels like less power, a lot more decel popping, etc. Anyway it's noticeable SOTP and just doesn't feel right. the AFR's are certainly not on the overly lean side but sure feels like it.
Now look at log0001 – which is logged data during an enabled TT auto tune session. Bike runs stronger, more power- but obviously I see why now, because the WB O2’s are reporting extra rich!
Both of these logs use the tune file I posted- thanks for confirming it is indeed still TT enabled.
I tried calling DJ for help this morning- got through to a tech at the consumer tuning devices extension- asked some questions and the tech said "uhh well I don't really know anything about tuning or the tuning products" - said he'd have someone call me back asap. that was hours ago and nothing. just so you know I'm trying the usual support avenues but it's not ideal, unfortunately.
Last edited by LA_Dog; Feb 8, 2016 at 02:21 PM.






